Ok guys need some help here. ne1 here done a y5 to y8 headswap? if so, did u change the wire harness cuz the y5 doesnt have a knock sensor? or did u change for a y8 harness? reason i ask, ive done this and used a y8 harness so i have the knock sensor but dont have a secondary o2 sensor plug because its under the dash. where the y8 has the secondary on the engine harness. got that